NAME amcrypt-ossl - crypt program for Amanda symmetric
data encryption using OpenSSL

SYNOPSIS amcrypt-ossl [-d]

DESCRIPTION amcrypt-ossl uses OpenSSL to encrypt and
decrypt data. OpenSSL is available from www.openssl.org.
OpenSSL offers a wide variety of cipher choices (
amcrypt-ossl defaults to 256-bit AES) and can use hardware
cryptographic accelerators on several platforms.

amcrypt-ossl will search for the OpenSSL program in the
following directories:
/bin:/usr/bin:/usr/local/bin:/usr/ssl/bin:/usr/local/ssl/bin.

PASSPHRASE MANAGEMENT amcrypt-ossl uses the same pass
phrase to encrypt and decrypt data. It is very important to
store and protect the pass phrase properly. Encrypted backup
data can only be recovered with the correct passphrase.

OpenSSL´s key derivation routines use a salt to
guard against dictionary attacks on the pass phrase; still
it is important to pick a pass phrase that is hard to guess.
The Diceware method (see www.diceware.com) can be used to
create passphrases that are difficult to guess and easy to
remember.

FILES /var/lib/amanda/.am_passphrase File containing the
pass phrase. It should not be readable by any user other
than the Amanda user.